Molars
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Molars
The molars or molar teeth are large, flat at the back of the . They are more developed in . They are used primarily to during . The name ''molar'' derives from Latin, ''molaris dens'', meaning "millstone tooth", from ''mola'', and ''dens'', tooth. Molars show a great deal of diversity in size and shape across mammal groups. The third molar of humans is sometimes . Human anatomy In humans, the molar teeth have either four or five . Adult humans have 12 molars, in four groups of three at the back of the mouth. The third, rearmost molar in each group is called a . It is the last tooth to appear, breaking through the front of the gum at about the age of 20, although this varies from individual to individual. Race can also affect the age at which this occurs, with statistical variations between groups. In some cases, it may not even erupt at all. The human mouth contains upper (maxillary) and lower (mandibular) molars. They are: , , , , , and . Mammal evolution In mammals, th ...
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Tribosphenic Molar
The molars or molar teeth are large, flat tooth, teeth at the back of the mouth. They are more developed in mammal, mammals. They are used primarily to comminution, grind food during mastication, chewing. The name ''molar'' derives from Latin, ''molaris dens'', meaning "millstone tooth", from ''mola'', millstone and ''dens'', tooth. Molars show a great deal of diversity in size and shape across mammal groups. The third molar of humans is sometimes vestigial. Human anatomy In humans, the molar teeth have either four or five cusp (dentistry), cusps. Adult humans have 12 molars, in four groups of three at the back of the mouth. The third, rearmost molar in each group is called a Third molar, wisdom tooth. It is the last tooth to appear, breaking through the front of the gum at about the age of 20, although this varies from individual to individual. Race can also affect the age at which this occurs, with statistical variations between groups. In some cases, it may not even erupt at ...
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Tooth
A tooth (plural teeth) is a hard, calcified Calcification is the accumulation of calcium salts in a Tissue (biology), body tissue. It normally occurs in the formation of bone, but calcium can be deposited abnormally in soft tissue,Miller, J. D. Cardiovascular calcification: Orbicular origi ... structure found in the jaw The jaw is any opposable articulated structure at the entrance of the mouth In animal anatomy Anatomy (Greek ''anatomē'', 'dissection') is the branch of biology concerned with the study of the structure of organism In biology, an ...s (or mouth In animal anatomy Anatomy (Greek ''anatomē'', 'dissection') is the branch of biology concerned with the study of the structure of organism In biology, an organism (from Ancient Greek, Greek: ὀργανισμός, ''organismos'') is ...s) of many vertebrate Vertebrates () comprise all species of animal Animals (also called Metazoa) are multicellular eukaryotic organisms tha ...
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Wisdom Tooth
A third molar, commonly called wisdom tooth, is one of the three per of the . It is the most of the three. The age at which wisdom teeth come through () is variable, but this generally occurs between late teens and early twenties. Most adults have four wisdom teeth, one in each of the four quadrants, but it is possible to have none, one to three, or more than four, in which case the extras are called . Wisdom teeth may get stuck () against other teeth if there is not enough space for them to come through normally. Impacted wisdom teeth are still sometimes removed for orthodontic treatment, believing that they move the other teeth and cause crowding, though this is not held anymore as true. Impacted wisdom teeth may suffer from if oral hygiene becomes more difficult. Wisdom teeth which are partially erupted through the gum may also cause inflammation and infection in the surrounding gum tissues, termed . Some more , such as , may be fitting for some cases, yet impacted wisdom ...
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Third Molar
A third molar, commonly called wisdom tooth, is one of the three per of the . It is the most of the three. The age at which wisdom teeth come through () is variable, but this generally occurs between late teens and early twenties. Most adults have four wisdom teeth, one in each of the four quadrants, but it is possible to have none, one to three, or more than four, in which case the extras are called . Wisdom teeth may get stuck () against other teeth if there is not enough space for them to come through normally. Impacted wisdom teeth are still sometimes removed for orthodontic treatment, believing that they move the other teeth and cause crowding, though this is not held anymore as true. Impacted wisdom teeth may suffer from if oral hygiene becomes more difficult. Wisdom teeth which are partially erupted through the gum may also cause inflammation and infection in the surrounding gum tissues, termed . Some more , such as , may be fitting for some cases, yet impacted wisdom ...
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Mandibular Third Molar
A third molar, commonly called wisdom tooth, is one of the three per of the . It is the most of the three. The age at which wisdom teeth come through () is variable, but this generally occurs between late teens and early twenties. Most adults have four wisdom teeth, one in each of the four quadrants, but it is possible to have none, one to three, or more than four, in which case the extras are called . Wisdom teeth may get stuck () against other teeth if there is not enough space for them to come through normally. Impacted wisdom teeth are still sometimes removed for orthodontic treatment, believing that they move the other teeth and cause crowding, though this is not held anymore as true. Impacted wisdom teeth may suffer from if oral hygiene becomes more difficult. Wisdom teeth which are partially erupted through the gum may also cause inflammation and infection in the surrounding gum tissues, termed . Some more , such as , may be fitting for some cases, yet impacted wisdom ...
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Maxillary Third Molar
A third molar, commonly called wisdom tooth, is one of the three per of the . It is the most of the three. The age at which wisdom teeth come through () is variable, but this generally occurs between late teens and early twenties. Most adults have four wisdom teeth, one in each of the four quadrants, but it is possible to have none, one to three, or more than four, in which case the extras are called . Wisdom teeth may get stuck () against other teeth if there is not enough space for them to come through normally. Impacted wisdom teeth are still sometimes removed for orthodontic treatment, believing that they move the other teeth and cause crowding, though this is not held anymore as true. Impacted wisdom teeth may suffer from if oral hygiene becomes more difficult. Wisdom teeth which are partially erupted through the gum may also cause inflammation and infection in the surrounding gum tissues, termed . Some more , such as , may be fitting for some cases, yet impacted wisdom ...
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Mandibular First Molar
The mandibular first molar or six-year molar is the tooth A tooth (plural teeth) is a hard, calcified Calcification is the accumulation of calcium salts in a Tissue (biology), body tissue. It normally occurs in the formation of bone, but calcium can be deposited abnormally in soft tissue,Miller, J. ... located distally (away from the midline of the face The face is the front of an animal's head that features the eyes Eyes are organs An organ is a group of tissues with similar functions. Plant life and animal life rely on many organs that co-exist in organ systems. A given organ's tis ...) from both the mandibular second premolar The mandibular second premolar is the tooth A tooth (plural teeth) is a hard, calcified structure found in the jaws (or mouths) of many vertebrate Vertebrates () comprise all species of animal Animals (also called Metazoa) are mul ...s of the mouth In animal anatomy Anatomy (Greek ''anatomē'', 'dissection') is t ...
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Maxillary First Molar
The maxillary first molar is the human tooth The human teeth function to mechanically break down items of food Food is any substance consumed to provide Nutrient, nutritional support for an organism. Food is usually of plant, animal or Fungus, fungal origin, and contains essential nu ... located laterally (away from the midline of the face) from both the maxillary second premolars of the mouth but mesial (toward the midline of the face) from both maxillary second molars. The function of this Molar (tooth), molar is similar to that of all molars in regard to grinding being the principal action during mastication, commonly known as chewing. There are usually four cusp (dentistry), cusps on maxillary molars, two on the Anatomical terms of location#Teeth, buccal (side nearest the cheek) and two palatal (side nearest the palate). There may also be a fifth smaller cusp on the palatal side known as the Cusp of Carabelli. Normally, maxillary molars have four lobes, two buccal ...
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Maxillary Second Molar
The maxillary second molar is the tooth A tooth (plural teeth) is a hard, calcified Calcification is the accumulation of calcium salts in a Tissue (biology), body tissue. It normally occurs in the formation of bone, but calcium can be deposited abnormally in soft tissue,Miller, J. ... located distally (away from the midline of the face The face is the front of an animal's head that features the eyes Eyes are organs An organ is a group of tissues with similar functions. Plant life and animal life rely on many organs that co-exist in organ systems. A given organ's tis ...) from both the maxillary first molar The maxillary first molar is the human tooth The human teeth function to mechanically break down items of food Food is any substance consumed to provide Nutrient, nutritional support for an organism. Food is usually of plant, animal or ...s of the mouth In animal anatomy Anatomy (Greek ''anatomē'', 'dissection') is the branch of biology ...
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Mandibular Second Molar
The mandibular second molar is the tooth A tooth (plural teeth) is a hard, calcified Calcification is the accumulation of calcium salts in a Tissue (biology), body tissue. It normally occurs in the formation of bone, but calcium can be deposited abnormally in soft tissue,Miller, J. ... located distally (away from the midline of the face The face is the front of an animal's head that features the eyes Eyes are organs An organ is a group of tissues with similar functions. Plant life and animal life rely on many organs that co-exist in organ systems. A given organ's tis ...) from both the mandibular first molar The mandibular first molar or six-year molar is the tooth A tooth (plural teeth) is a hard, calcified structure found in the jaws (or mouths) of many vertebrate Vertebrates () comprise all species of animal Animals (also called Me ...s of the mouth In animal anatomy Anatomy (Greek ''anatomē'', 'dissection') is the branch of biology ...
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Cusp (dentistry)
A cusp is a pointed, projecting, or elevated feature. In animal Animals (also called Metazoa) are multicellular eukaryotic organisms that form the Kingdom (biology), biological kingdom Animalia. With few exceptions, animals Heterotroph, consume organic material, Cellular respiration#Aerobic respiration, ...s, it is usually used to refer to raised points on the crowns of teeth A tooth (plural teeth) is a hard, calcified Calcification is the accumulation of calcium salts in a Tissue (biology), body tissue. It normally occurs in the formation of bone, but calcium can be deposited abnormally in soft tissue,Miller, J. .... The concept is also used with regard to the leaflets of the four heart valve A heart valve is a Check valve, one-way valve that allows blood flow, blood to flow in one direction through the chambers of the heart. Four valves are usually present in a mammalian heart and together they determine the pathway of blood flow throu ...s. The mitral valve Th ...
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Platypus
The platypus (''Ornithorhynchus anatinus''), sometimes referred to as the duck-billed platypus, is a semiaquatic In biology Biology is the natural science that studies life and living organisms, including their anatomy, physical structure, Biochemistry, chemical processes, Molecular biology, molecular interactions, Physiology, physiological mechanisms ..., egg-laying mammal Mammals (from Latin language, Latin , 'breast') are a group of vertebrate animals constituting the class (biology), class Mammalia (), and characterized by the presence of mammary glands which in Female#Mammalian female, females produce milk ... endemic Endemism is the state of a species In biology Biology is the natural science that studies life and living organisms, including their anatomy, physical structure, Biochemistry, chemical processes, Molecular biology, molecular interact ... to eastern Australia Eastern may refer to: Transportation *China Eastern Airlines, a ...
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